All 181 passengers and crew aboard a passenger jet that crashed upon landing in South Korea on Sunday morning are presumed dead except for two people rescued from the wreckage, authorities said.

Investigators will try to determine what happened on the plane, including how its mechanical systems were functioning and what actions the pilots took.

The Jeju Air jetliner was carrying 175 passengers and six crew when it crash-landed at Muan International Airport just after 9 a.m. local time Sunday.

South Korean officials are struggling to determine what caused a deadly plane crash that killed nearly 180 people on board, with the nation saddened, shocked and ashamed over the country’s worst aviation disaster in decades.

A 33-year-old flight attendant, one of just two survivors of the Jeju Air plane crash in South Korea that killed 179 people, is awake and talking to medical staff, according to a hospital official. The survivor,

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After over 100 people were killed in a South Korea plane accident, here are the worst accidents and crashes in aviation history.

The flight, operated by Jeju Air, was landing when it went off the runway in Muan, in the country’s southwest. Only two people survived the crash.

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One was a 33-year-old man, with the surname Lee, who was rushed to a hospital in Mokpo, about 25km (15.5 mi) south of the airport, but was later transferred to Ewha Womans University Seoul Hospital in the capital, Yonhap news agency reported.

Jimmy Carter, who rose from a peanut farm to become the 39th U.S. president, died on Sunday at his home in Georgia. He was 100.